Quote Originally Posted by 37 Caddy View Post
So the short story is that I fried a perfectly good transmission, 4L80E, in my quest to get my 37 LaSalle ready for the Goodguys show two weeks ago. Now I will replace the transmission and have some questions on keeping in cool.

Here are my questions:
1. Should I use the integrated tranny cooler in the existing radiator?
2. Any good ideas about how to mount an external tranny cooler? Pics would be great.
3. What size line should I use? I have some long lengths of 3/8 hard line but the transmission is plumbed for 5/16. I can get adapters/fittings. Would the bigger diameter line help with cooling or create other unintended consequences?

Thank you
Can I ask, how did you hurt the tranny? Pulling hole shots? The reason I ask is a friend has an overdrive tranny (GM, but I think it's a 700R4) and he's been running it for 2 years now with no cooler and I'm not sure how he gets away with it!

question 1. I would and usually do. I first go through the radiator cooler then loop into a auxillary cooler set in front of the radiator.

#2, sorry - no pics, but, a simple mount from angle stock always seems to work for me.

# 3, I usually work with 3/8". The size causes no issues that I know of.

On my 34 right now I have the lines tucked along the block mounted on a bracket I made that comes off a couple base pan bolts. Hope this helps.